Ah, ok. I wasn't aware how flags work in Cabal, thanks. Makes me wonder why that flag was turned off on hackage. http://hackage.haskell.org/package/reactive-banana On Jun 27, 2012, at 5:51 PM, Andres Löh wrote:
Hi.
I tried to install reactive-banana. This failed due to a dependency conflict, and then I noticed there was a newer version of reactive-banana. So I did cabal update, and tried to install again. But whatever I do, cabal keeps trying to install fclabels, but fclabels is no longer a dependency of reactive-banana-0.6.0.0! How can I let cabal forget this dependency?
From the reactive-banana Cabal file:
if flag(UseExtensions) extensions: TypeFamilies, GADTs, MultiParamTypeClasses, BangPatterns, TupleSections, EmptyDataDecls build-depends: QuickCheck >= 1.2 && < 2.5, fclabels == 1.1.*, unordered-containers >= 0.2.1.0 && < 0.3, hashable == 1.1.* CPP-options: -DUseExtensions
So try "-f-UseExtensions" if you really want that?
Cheers, Andres
-- Andres Löh, Haskell Consultant Well-Typed LLP, http://www.well-typed.com
-- Sjoerd Visscher https://github.com/sjoerdvisscher/blog